Multi-Standard Analogue TV Demodulator
Showman 1000
Getting Started
2008 dB Broadcast Ltd
18
Provisional Version 0.3
Press <ENTER> to accept or <ESCAPE> to reject the selection
Press <ESCAPE> again to return to DEFAULT
When Showman 1000 is correctly tuned, between five and nine segments of the RF
LEVEL bar graph should be solid.
4.
Using the optional IF Input
The IF Input has 50Ω nominal impedance. All connectors, co
-axial cables and signal
generators sh
ould be 50Ω. Apply a
-35 to -7dBm (4 to 100mVrms) 38.9MHz video signal
to the IF IN connector.
To select IF input:
From DEFAULT press: <ENTER>
▼ ▼ <ENTER> <ENTER>
Note:
The LCD must show Input Source/RF Input for the option to be available,
otherwise press <ESCAPE> twice to return to DEFAULT.
If RF Input is displayed press
▲ or ▼ to select IF Input.
Press <ENTER> to accept or <ESCAPE> to reject the selection.
Press <ESCAPE> again to return to DEFAULT.
With the above I.F. signal applied, between five and ten segments of the IF LEVEL
bar graph should be solid.
Note:
For information on how to change other settings, refer to the Operation chapter.
5.
Top-Level Monitoring
Repeat pressing of
► will step the LCD through the following “Top
-Level” monitoring
pages:
System Alarms:
One or more of the following 3 letter codes may be displayed:
TST = Self test fail
SYN = Sync fail
LEV = Low signal level
NIC = Nicam error rate fail
TMP = Temperature <+10ºC or >+70ºC
PSU = Power supply outside limits
Standard:
Indicates the television TV standard to which Showman 1000 is set and
the detection or validity of any incoming sound carriers (S1 and S2).
S1 “Yes” indicates that a primary FM or AM carrier is detected.
S2 “Yes” indicates that a valid secondary FM or Nicam carrier for Stereo or Dual
Language/SAP operation is detected.
S2 “No” indicates that a second FM or Nicam carrier is either absent, not valid or
is set to mono.
Note:
the TV standard has to be set manually.
